Which product development decision by a major music company is widely credited with revolutionizing the industry by creating the first successful legal digital music marketplace?

The music industry has evolved dramatically through technological innovations and product development strategies. Major companies have pioneered different approaches to meet changing consumer preferences. This poll tests your knowledge about a significant product development milestone that transformed how people consume music. Can you identify which groundbreaking innovation marked a true turning point in the industry's history?

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Sony's introduction of the MiniDisc format in 1992
Apple's launch of iTunes Store in 2003, selling individual songs for $0.99
Spotify's development of the freemium streaming model in 2008
Amazon's creation of the first MP3 download store in 2007